Carbureter.



H. C. ROTH.

GARBURETBR.

APPLICATION-FILED JAN.26,1912. ms @aimed mt. 29 1912.

Z SHEETS-SHEET Z,

UNITED STATES, PATENT ortica.

CARBURETER.

Specification of Letters Pa'tent.

provement has more special reference to the oil admission and oil distributing feature of the carburetor, the object being to provide a carbureter in which the proportion of air and oil maybe properly regulated and held uniform -at all speeds of the engine, and a thorough mingling ofthe oil and air ob tained.

In the accompanying drawings Figure 1 is a vertical section of a carbureter embodying my improvement; Fig. 2 is a central vertical section of same taken as indicated by the line 2--2 in Fig. 1; Fig. 3 represents a vertical section of the lower end of the carbureter with the air damper valve shown in closed position; Fig. 4 is a side elevation of attached; and Fig. 8 represents an enlarged theupper half of the oarbureter showing the screened air inlet; Fig. 5 is a fragmentary front elevation illustrating the construction and connection of the levers for operating the air and oil valves; and Fig., 6 shows a similar view but with the levers in their open position; Fig. 7 is a detail perspective of the valve head which forms the oil inlet '10, in the lower portion of the casing ofthe and oil reservoir, with the deflected plates detail section of the --constricted conical shaped oil inlet and valve for controlling Same.

The body of the carbureter is formed by the twoparallel side plates 1, 1, which are secured at theirupper ends to the head 2 by.

means of screws or solder. The side plates 1 are grooved along their inner edges, these grooves 3 receiving the casing 4, which constitutes the ends and bottom of the body. The casing 4 is provided near its upper end withthe openings 5 for the admission of air, these openings being covered with the fine mesh screen 6 which is soldered to the casing. The carbureter head 2 is designed to be secured to the engine cylinder (not shownlv by means of lsuitable bolts (not shown engaging the holes 7. The said head 2 is provided with an opening or port 8 through which the mixture is drawn into the engine.

Between the plates l, 1 are hinged, on the pins 9, 9, the oppositely disposed coacting Patented oct. 29,1912. 'Application mea January ze, 1912. serial No. 673,564.

plates 10, 10, whlch terminate at their uper ends adjacent the mixture port 8, formmg an adjustable closure for same. In order to secure greater contact between the ends of the plates 10 and head 2,' the ends'of said plates are provided with the laterally deflected ends 11. Structurally and functionally, the plates 10, 10 and their operating levers are substantially the same as the corresponding plates 1n the carbureter of the application to 'which reference has been made.

A shaft 12, parallel with thehinge pins 9,

is supported in the walls 1, 1 of the' upperportion of the body,.the headed bushings 13 and 14, whlch are fixedto the ends of said shaft, holding same against endwise vInoveshaft 12, connects, by means of the links 16, with the plates 10.; so that when the. shaft'f12 is caused to rock it will cause said platesto either open or close the port opening 8, -depending on the direction in which the 'shaft- I1s made to rock. Rocking movement ofthe shaft 12 is effected by means of the operating lever 17, which is secured to saidshaft,

as shown, through the boss 18, the latter .mentl .A lever 15, centrally secured to the forming part of the shaft 12. The operatfing lever 17 is provided with the curved arm 19, having the arcuate slot 2O formed therein. Below the hinge pins 9 of the curved plate carbureter, is arranged the air or damper Valve 21. In Fig. 1 this valve is shown open, and m Fig. 3 it is shown closed. In

starting the engine this damper valve is partly closed in order to secure a richer mixture. The valve is covered on its upper, or-

seat contacting side, with the felt -22,'a`fnd'is lifted by the operator through the rodv 22. the bell crank 24, which is" pivoted ina su itable support on the bottom of the carbureter, and the stem 25, as clearly shown 'in` and associated parts. The valve head 27, in

which i 1 formed the oil reservoir 28, extends transversely between and is supported by V connection with the lever 36,the handle lock= the walls 1,1 of the carburetor body, and is located in thc contracted portion of the carbureter chamber between the inwardly projecting port-ionsl lt) 1 of the plates l0. '.lhe lower portion of saidvalve head 27 has formed therein the oil conduit 39 connecting at its receiving end with the constant level cup 30, and terminating at its delivery end in the said reservoir 25, 'lhe oil reservoir 2S communicates with the air passageway of the carburcting chamber through the plurality of orifices 3i. Normally the oil is at the level indicated by the line 32 in the oil inlet 29, and is sucked out through the orifices 31 because of the partial vacuum existing in that portion ot' the carbureter chamber above said voil inlet, the partial vacuum being due, of course, to the aspiration stroke of the' piston. l

In starting the engine they carburetor is flooded and the reservoir 2S filled. To more effectively vaporize the oil deiiector plates -33 are made to extend across the carburetor chamber immediately above the orifices 31, so that the air in being drawn by saineat a high velocity will impinge said detlector plates with the entrained oil and thus secure a thorough mixture of 'oil and air. lThe oil conduit 29 terminates at the reservoir 2S in tlie'constricted conical shaped -opening 3l. The peculiar shape of this opening, in conjunetion'with, the vertical valve stein 35, has the effect of very thoroughly breaking up the oil.

-The upper end of the valve stein. 35 is formed to receive the conical point of the valve adjusting lever 36. A helical spring 37 operates normally to lift the valve stem' from its seat, whileadvance movement of the valve adjusting lever 36 will tend to close the valve, and a backing 0E of same will operate to open the valve. 'lhe lvalve lever36 is supported in the fixed bushing 38, which is, in turnJ mounted in one. of the side plates l of the carburetor. The cap 39 has a threaded nut/10 locking these members together, and the cap 39 has a threaded connection (right or left, as the direction of movement of the levers ni y require), with the bushing 3S. It follows that a. rocking movement of the adjusting lever 36 will effect endwiseniove ment of saine and thus raise or lower the valve stein 35, opening or closing the -valve accordingly. A linlt 4.1 connect-s the arm 42 of the threaded cap 39 with thel slotted arm 19 of the valve adjusting lever ,17. The connection between the link 4Q and said arm 19 is adjustable in the arcuate slot 2t), this slot having a center ot' curvature corresponding with the pivotal center bet-Ween said link 41 and arm 42, when the latter is in its closed position, the same as the corresponding construction in my former applicat-ion before referred to.

By the above described construction the mixture is thoroughly vaporized,t and furthermore, accurate and positive adjustment can be made t-o insure a proper amount of fuel at both low and high speed, and a uniform mixture may be obtained at all speeds,

What ,l claim as my invention, and desire to secure by Letters Patent, is:

l. ln a carburetor, in combination, a carbureting' chamber, an oil reservoir located therein and provided with a plurality of upwardly extending orifices for the ejection of oil, deflector plates arranged above said reservoir, a. constant level cup, a conduit connecting the cup and reservoir, said conduit terminating in the reservoir in a constricted, valve-controlled, conical-shaped opening, and an oil valve for controlling said opening, substantially as described.

i 2. In a carburcter, in combination, a carbureting chamber, an oil reservoir located' therein and provided with a plurality of upwardly extending orifices for the ejection of oil, delector plates'ar -anged above said reservoir, a lconstant level cup, a 'conduit connecting the cup and reservoir, said conduit terminating in the reservoir in a const-ricted, valve-controlled, conicalshaped opening, an oil valve comprising a vertically arranged stem and a horizon tally arranged valve adjusting lever, the contacting ends thereof being formed v -ith correspondingly tapered heads, and a spring for normally holding the vertically arranged stein in open position, substantialy as described.

3. ln afcarbureter, in combination, a body formed with parallel sides and provided at its upper end with a mixture discharge port and at its lower end with an air inlet, t-wo oppositely disposed coacting plates within said body, said plates being hinged at their lower ends, curved inwardly intermediate oi their length to forni a contracted air passageway, and terminating at their upper ends adjacent the mixture discharge port, an oil inlet. ,located in the carbureting charnber between the inwardly curved portions' of said plates, ay vertically movable damper valve arranged to control the opening of the cont-rolling the movement of the hingedadjusting lever, the contactin0r ends thereof oeing formed with correspondingly tapered izo air inlet, a spring operating to hold said valve in an open position, and means for.

Leemeee heads, a spring `fomrnormally holding he means actuated in conjunction with seid. Vertical siem in open poson, a IXed bnslr mixing valve for imparting rocking lnove- 10 ing ''ormng a support for the transversely ment to the transversely arranged adjustarranged valve adjusting lever5 a cap Sel able lever, subsantzLlly described.

Cured by lock-nut no che transverse lever and l HARRIS C. ROTH. having a, llreaded connection with seid xed Vltnesses: bushing whereby re'afton of said ler/'er will ROY C. TREET7 effect leng'tnclinel movement 'l'xereof, endl JAMES M. HAMXLTQN 

